#include <iostream>
#include <hash_map>
#include <string>

using namespace stdext;
using namespace std;

int main()
{
	hash_map<int,string> hm;
	hm[1]="lixiang";
	hm[2]="haha";
	hm[1]="tiancai";
	cout<<hm.size()<<endl;
	cout<<hm.at(1)<<endl;
	system("Pause");
	return 0;
}